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(No Model.)

E.;Z. O-OLLINGS. Underground El'eotric Conductor. No. 243,215. Patented )une 21,1881.

itnessss: i nhmtnr: www @M by l UNITED STATES PATENT OFFICE.

EDWARD Z. OOLLINGS, OF OAMDEN, NEV JERSEY.

UNDERGROUND ELECTRIC CONDUCTOR.

SPECIFICATION forming part of Letters Patent No. 243,215, dated June 21, 1881.

Application filed March 30,1881.

To all whom it may concern Be itknown that I, EDWARD Z. CoLLINGs, a citizen ofthe United States, residing at Oamden, in the county of Camden, State of New Jer ey, have invented a new and useful lmprovement in Underground Electric Conductors, which improvement is fully set t'orth in the following specification and accompanying drawings, in which- Figure l is a view showing the conductor embodying my invention in position. Fig. 2

is a section, enlarged, in line x zr, Fig. l. Fig.

3 is a section of a modification.

Similar letters of reference indicate corresponding parts in the several tlgures.

My invention consists ot" an underground electric conductor formed of lengths of tubing and detachable or separated trays fitted within the same, whereby when the tubing is laid the trays may be conveniently located and provide means for supporting, inclosing, and separating the electric wires or cables.

It also consists of testing-stations adapted for operating fromabove the ground the wires or cords which draw the electric Wiles or cables through the conductors.

Referring to the drawings, A represents a tube or tubing, formed of glazed terra-cotta, glass, or other suitable material, properlyr laid in the earth in the direction the electric wires or cables are to run.

B represents a series of trays, which are adapted to be placed one above the other, support each other in the tube A, and till thc space thereof. On the upper and lower faces of the trays, or one face ot' each, are horizontally-extending channels a, for the reception of the electric wires or cables.

The tubing is laid in lengths or sections properly' connected, and the trays B are run thereinto at one end and pushed along the required extent, and the electric wires or cables (No model.)

the tubing or shells A, the channels a, not

liable to become distorted in the process of construction of the trays, will be found to be uniform and unobstructed.

In Fig. 3 I show a modification, where the trays are supported on ledges formed on the sides of the inner face of the tube.

The conductors lead into testing-stations C, located in the ground at proper distance apart, formed of a water-proof and suitably-closed vault, provided with one or more rollers, D. properly mounted within the same,over which the d rawing-wires connected to the conductors may be run for the purpose of operating said wires outside of the stations, as shown in Fig. 1, said operation being conveniently accomplished without the necessity ot the workman remaining in the station longer than is neces sary to start the work.

' Having thus describedmy invcntion,what I claim as new, and desire to secure by Letters Patent, is-

l. A series of detachable trays,B, each having one or more grooves on both its upper and its lower side,in combination with a tube which incases said trays and holds them together, so that each lower groove ot' one tray and the corresponding upper groove of the tray below it will form a passage for a line-wire,substan tially as set forth.

2. The tube A, having semi-cylindrical interior grooves at both ends, in combination with detachable grooved trays B, substantially as set forth.

E. Z. OOLLINGS.

Witnesses JOHN A. WIEDERSHEIM, F. COOPER. 

